CODEWITHSUNDEEP
javascriptlocation
matt
matt

Reputation: 44293

javascript: find 2nd last appearance of string inside string?

I have this URL http://www.something.com/category and 

top.location.href.substr(0, top.location.href.lastIndexOf("/") );

returns http://www.something.com

However if I have the URL http://www.something.com/category/something how can I again retrieve http://www.something.com by removing the 2nd last appearance of "/" …

Any idea? I know there is stuff like top.location.origin. I need a way to cut the last two "slashes" off!

Upvotes: 0

Views: 271

Answers (2)

Rob W
Rob W

Reputation: 348972

Since you're working with the location object, use:

location.protocol + '//' + location.host + '/';
// On this page, it shows: http://stackoverflow.com/
// Include pathname:
location.protocol + '//' + location.host + location.pathname + '/';

For your own solution, you can add +1 to the second argument:

top.location.href.substr(0, top.location.href.lastIndexOf("/")+1 );
                                                              ^^ Hi Plus One!

Response to updated question (see OPs comments):

var href = top.location.href.replace(/(\/[^\/]+){2}\/?$/, '');

Upvotes: 1

JaredPar
JaredPar

Reputation: 754565

Instead of going backwards which can have a variable number of indexes, why not go forwards where you know there will only be 2 ahead of it? 

var url = top.location.href;
var index1 = url.indexOf('/');
var index3 = url.indexOf('/', index1 + 2);
var final = url.substr(0, index3);

Upvotes: 0

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